thomas. Tandem Roller. June 04th , 2018.
Road rollers use the weight of the vehicle to compress the surface being rolled (static) or use mechanical advantage (vibrating). Initial compaction of the substrate on a road project is done using a padfoot drum roller which achieves higher compaction density due to the pads having less surface area. On large freeways a four wheel compactor with padfoot drum and a blade such as a Caterpillar 815/825 series machine would be used due to its high weight speed and the powerful pushing force to spread bulk material. On regional roads a smaller single padfoot drum machine may be used.
Rollers are also used in landfill compaction. Such compactors typically have padfoot or "sheep s-foot" drums and do not achieve a smooth surface. The pads aid in compression due to the smaller area contacting the ground.
An intermediate gear which does not drive a shaft to perform any work is called an idler gear. Sometimes a single idler gear is used to reverse the direction in which case it may be referred to as a reverse idler. For instance the typical automobile manual transmission engages reverse gear by means of inserting a reverse idler between two gears.
Any content, trademark/s, or other material that might be found on this site that is not this site property remains the copyright of its respective owner/s. In no way does thomaskc.com claim ownership or responsibility for such items, and you should seek legal consent for any use of such materials from its owner.